I agree. If that is not the case for some reason, you can use a formula like this to display the detail percents and calculate the total
Global NumberVar TotalPercent;
Local NumberVar ThisPercent;
ThisPercent := {GetCallIssueByTechResolution;1.Expr1} / Sum ({GetCallIssueByTechResolution;1.Expr1});
TotalPercent := TotalPercent + ThisPercent ;
ThisPercent
mlmcc